利用應變計及光纖感測器至核能電廠閥桿受力監控

本研究主要目標為解決核能電廠閥桿操作時扭力及軸向力之監控之近程及遠程需求。有關近程需求，目前監控採國外製造的應變計組，一組要價數萬元，又只能使用於一次監測，每次大修上百隻閥桿，所費不貲。故近程需求為開發出本土之應變計組，以大幅節省成本。遠程之需求則為開發可供多次使用之量測設備，此部份利用光纖光柵感測器，先檢驗光纖光柵感測器對輻射環境的耐受性，次則探討以光纖光柵取代傳統應變計之可行性，結果證實光纖光柵感測器經受60Gy輻射照射後其特性未受影響，並能準確地量測閥桿的軸向與扭轉受力情形。

關鍵字

光纖光柵；核能電廠閥桿；應變感測

並列摘要

During routine overhaul, the axial force and torque in each valve stem in a nuclear power plant need to be monitored. Currently, pre-formed gages on a thin metal strip are used for this purpose. These gages are expensive and cannot last until the next overhaul. The current work attempts to fabricate similar gage that are ready for field use. The detailed requirements to ensure good accuracy during fabrication are analyzed. Practical gages have been manufactured and tested. The measured results agreed well with theoretical and experimented strain measured by sticking strain gages directly to the specimens. The durability of the gage varies from 30000 to beyond 60000 loading cycles depending on the adhesive used. Possibility of using fiber Bragg grating instead of resistance strain gage has also been investigated. The latter has the advantage that it can survive ionizing radiation

並列關鍵字

fiber Bragg grating ； nuclear power plant valve stem ； strain gage

參考文獻

1. 許仕坤, ”內埋式光纖光柵感測聚碳酸酯之動態行為”, 台灣大學機械工程研究所碩士論文, 2006, Pages 5-7

6. M.A. Caponero, ”THE OMEGA-LIKE: A NOVEL DEVICE USING FBG SENSORS TO POSITION VERTEX DETECTORS WITH MICROMETRIC PRECISION”, IPRD, 2006, Page 6

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利用應變計及光纖感測器至核能電廠閥桿受力監控

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